title: Simultaneous determination of five marker compounds in Xuanfu Daizhe Tang by high-performance liquid chromatography coupled with diode array detection for quality control.
abstract: BACKGROUND
  Xuanfu Daizhe Tang (XDT) is a classical traditional Chinese medicinal prescription that has been widely used for treating digestive system illnesses for hundreds of years.
  
  
  METHODS
  In this study, a simple and sensitive high-performance liquid chromatography coupled with diode array detection (HPLC-DAD) method was established for the simultaneous determination of five marker compounds in XDT including chlorogenic acid, glycyrrhizic acid, ginsenoside Rg1, ginsenoside Rb1 and ginsenoside Re, for quality control of this well-known traditional Chinese medicine (TCM).
  
  
  RESULTS
  These compounds were separated in less than 130 min using a YMC C18 column with a gradient elution system of acetonitrile and 0.1% phosphoric acid water solution at a flow rate of 1 ml/min. All calibration curves of standard components showed good linearity with R(2) >0.9991. Limit of detection and limit of quantification varied from 0.11 to 4.3 μg/ml and 0.20 to 11.6 μg/ml, respectively. The relative standard deviations (RSDs) of the intra-day and inter-day experiments were less than 4.72 and 5.48%, respectively. The accuracy of recovery test ranged from 95.0 to 105.0% with RSD values 1.28- 4.32%.
  
  
  CONCLUSIONS
  The validated method is simple, reliable, and successfully applied to determine the contents of the selected compounds in XDT for quality control.
authors.affiliation: Engineering Research Center of State Ministry of Education for Standardization of Chinese Medicine Processing, Nanjing University of Chinese Medicine, Nanjing 210029, PR China ; Nanjing Haichang Chinese Medicine Group Corporation, Nanjing 210061, PR China.
authors.forename: Kunming
authors.initials: K
authors.lastname: Qin
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Cai
authors.forename: Weidong
authors.initials: W
authors.lastname: Li
authors.forename: Zhongqing
authors.initials: Z
authors.lastname: Yao
authors.forename: Xingde
authors.initials: X
authors.lastname: Zhang
authors.forename: Tulin
authors.initials: T
authors.lastname: Lu
authors.forename: Baochang
authors.initials: B
authors.lastname: Cai
keywords: High-performance liquid chromatography coupled with diode array detection; Xuanfu Daizhe Tang; quality control; traditional Chinese medicine